import { type SpanOptions } from "@opentelemetry/api";
export interface ExtendedSpanOptions extends SpanOptions {
    /**
     * Callback to run when the method returns successfully.
     * Allows setting attributes based on the return value.
     */
    onResult?: (result: any) => {
        attributes?: SpanOptions["attributes"];
    } | undefined;
}
type SpanDecoratorOptions<T extends any[]> = ExtendedSpanOptions | ((...args: T) => ExtendedSpanOptions);
export declare function Span<T extends any[]>(options?: SpanDecoratorOptions<T>): (target: any, propertyKey: PropertyKey, propertyDescriptor: TypedPropertyDescriptor<(...args: T) => any>) => void;
export declare function Span<T extends any[]>(name?: string, options?: SpanDecoratorOptions<T>): (target: any, propertyKey: PropertyKey, propertyDescriptor: TypedPropertyDescriptor<(...args: T) => any>) => void;
export {};